In a small bowl, mix together crème fraiche (or light mayonnaise) and mustard.

Drizzle olive oil onto the bottom of a baking dish. Add potatoes and shake around until coated with the olive oil.

Push potatoes together in center of baking dish and then place salmon, skin side down, on top. Season with salt and pepper and then top with the crème fraiche mixture.

Bake for about 20 minutes, or until potatoes are tender and salmon is cooked through. Garnish with fresh parsley.

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